The movement of electrons as per Z scheme in light reaction is

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uphill in redox potential scale

Both B and C

downhill in redox potential scale

from low to high energy level

answer is D.

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Detailed Solution

According to the energy levels of electron carriers, the transport of electron from P₆₈₀ to pheophytin is uphill, from pheophytin to P₇₀₀ is down hill, from P₇₀₀to unnamed acceptor is uphill and from unnamed acceptor to NADP⁺is downhill.

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